Coldwell Banker Residential Brokerage can help you find Douglas, IL homes for sale, condos and open houses. Refine your Douglas real estate search results by price, property type, bedrooms, baths and other features. Need more information? View Coldwell Banker Residential Brokerage Douglas real estate agents or offices and let us help you find the perfect property. We also have area guides that show more information about properties in Douglas, IL.